I am brand new to Forex and have only two questions I hope someone can answer for me clearly and to the point:
Does one have to deal with interest doing Forex or can one also do Forex trading that is interest-free?
If there is interest free trading, how can I go about doing that?
Yes both the questions that you have asked have one answer 
You will need to use the Swap Free trading accounts so in that case you have nothing to do with the overnight interest rates.
All trades are “closed” at the end of the day, but you don’t see it. The broker will keep the position open and charge you a "roll-over"or “swap” fee. Some brokers do offer a “swap-free” account. But imo the majority don’t.
Not sure if this is exactly how it works, but this is how I understand it.
There is no interest free trading. Any broker have their spread and commissions.